Fix DataTables/TableTools #46 - fnGetData should return null if row not

found

- The old fnGetData method would return null, rather than undefined for
  some reason if a given row was not found in the DataTable. The new
  wrapper api for the legacy interface should do the same.

.datatables-commit-sync

@@ -1 +1 @@
-2380313b30b913d6909d88166fc77746a019e717
+0bc427ba863a2bd355b59629bd82281cc81e4d28

media/js/jquery.dataTables.js

@@ -5395,7 +5395,7 @@
 		
 				return col !== undefined || type == 'td' || type == 'th' ?
 					api.cell( src, col ).data() :
-					api.row( src ).data();
+					api.row( src ).data() || null;
 			}
 		
 			return api.data().flatten().toArray();